multiple Oracle home by the Windows installation

Hi!

I am installing two systems (SAP SOLMAN) with the same Oracle version.

<b>How should I set the Oracle home and the Listener entry port (double entry or only one) and how should I proceed with SAPINST-installation?</b>

The second question:

we have 64 Bit Windows and have to install SAP ERP2005.

<b>Which java-version should we apply, the one for 64 Bit or the other for 32 Bit windows, if we install only ABAP-part?</b>Basically we need the java for the SAPINST is not?

Because we do not have any Java-components. We install only ABAP-stack

Thank you!

regards